US5992360A - Valve drive for gas exchange valves of internal combustion engines - Google Patents
Valve drive for gas exchange valves of internal combustion engines Download PDFInfo
- Publication number
- US5992360A US5992360A US09/125,805 US12580598A US5992360A US 5992360 A US5992360 A US 5992360A US 12580598 A US12580598 A US 12580598A US 5992360 A US5992360 A US 5992360A
- Authority
- US
- United States
- Prior art keywords
- rocker arm
- coupling means
- insert element
- spring
- valve drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0005—Deactivating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
Definitions
- the invention concerns a valve drive for gas exchange valves of internal combustion engines comprising a switchable rocker arm on whose one end facing a valve stem is arranged a slidably mounted tappet element which can be coupled to or uncoupled from the rocker arm by a coupling means so that a valve lift or an idle stroke is effected, the coupling means being hydraulically actuatable against the force of a spring.
- a valve drive of the precited type is known from GB-A-2 075 118.
- a spring-loaded pressure pin is slidably mounted with a bottom thereof bearing against a valve stem of a gas exchange valve.
- the pressure piston is laterally connected by a coupling means to a spring-loaded and hydraulically displaceable piston.
- the pressure pin is either fixed in place or displaceable so that, upon a pivoting of the rocker arm, either the gas exchange valve is actuated or the pressure pin slides in the rocker arm i.e., the gas exchange valve is not actuated.
- a drawback of this structure is that, on the one hand, a complicated pressure oil supply comprising a plurality of oil channels is required and on the other hand, the mechanical connection between the pressure pin and the hydraulically displaceable piston is comprised of a plurality of differently configured mechanical components. The manufacture of such a switchable rocker arm is therefore very complicated and accordingly expensive.
- a switchable valve drive is known from DE 44 11 182 A1 which comprises two transmitting levers with a hydraulically actuatable locking element arranged therebetween.
- This hydraulically actuatable locking element is supplied with pressure from the oil supply of the valve clearance compensation element arranged in the rocker arm.
- a drawback of this is that this switchable valve drive is likewise very complicated and expensive to manufacture because two transmitting levers are required.
- DE-GM 93 15 436 also discloses a switchable cam follower in the form of a cup tappet which is composed of two relatively displaceable units whose coupling and uncoupling are assured respectively by a compression spring and by the oil pressure of a hydraulic clearance compensation element.
- this type of switching of two relatively displaceable units is entirely unsuitable for use in a switchable rocker arm.
- the invention achieves this object in that an insert element is arranged in the rocker arm, which insert element receives a hydraulic clearance compensation element in a bore which is open towards a valve stem, a second end of the insert element being supported in the rocker arm via a resetting spring while a bore extending perpendicular to a longitudinal axis of the rocker arm is arranged in each of the insert element and the rear end of the rocker arm for receiving the coupling means, and the hydraulic actuation of the coupling means is effected from an oil supply of the hydraulic valve clearance compensation element which is arranged in the rocker arm.
- the coupling means comprises a bushing arranged in the rocker arm, a slidable spring-loaded locking piston arranged in the interior of the bushing and a guide sleeve arranged in the support element and lodging a slidable locking cap.
- the resetting of the rocker arm is achieved by a torsion leg spring arranged a the pivot axle of the rocker arm, one leg of the torsion leg spring engaging the rocker arm body and a second leg engaging the insert element. Radial design space otherwise required for the resetting spring lodged within the rocker arm can be saved by these structural measures.
- the bushing arranged in the rocker arm protrudes slightly into the bore of the insert element so that a stop is formed.
- This stop is important for the exact positioning of the insert element and the hydraulic clearance compensation element.
- FIGS. 1 and 2 are side views of a rocker arm including fragmental sectional views thereof
- FIG. 3 is a top view of a rocker arm of FIG. 2 including a fragmental sectional view thereof.
- FIG. 1 shows a rocker arm 1 pivotally mounted on its axle 2.
- a front end 3 of the rocker arm 1 carries a rotatably mounted cam roller 4 which is loaded by a cam, not shown.
- a hydraulic clearance compensation element 6 which cooperates with a gas exchange valve, not shown either.
- the rear end 5 comprises a bore 7 which is open towards the gas exchange valve and lodges an insert element 8 whose bore 9, which is likewise open towards the gas exchange valve, receives the hydraulic clearance compensation element 6.
- a spring 10 compressed between an end face of the insert element 8 and the bottom of the bore 7 serves to reset the rocker arm 1.
- the rear end 5 of the rocker arm 1 and the insert element 8 comprise bores 11 and 12 respectively, which extend perpendicular to the longitudinal axis 19 and lodge a coupling means 13.
- This coupling means 13 comprises a bushing 14 which is inserted into the bore 11 and in which a locking piston 16 loaded by a spring 15 is slidably arranged.
- the bushing 14 protrudes slightly into the bore 12 of the insert element 8 so that a stop 24 is formed.
- the coupling means 13 further comprises a guide sleeve 17 which is fixed in the bore 12 of the insert element 8, while a locking cap 18 is slidably guided in the guide sleeve 17.
- the rocker arm 1 shown in the first figure is represented in the locked state i.e., in the state before the beginning of the ignition of the internal combustion engine.
- the locking piston 16 is pushed by the pressure of the spring 15 mechanically into the guide sleeve 17 so that a positive engagement is established between the rocker arm 1 and the insert element 8.
- the cam not shown, causes a pivoting of the rocker arm 1 about its axle 2, this pivoting motion is transformed into a vertically downward motion at the rear end 5. Since the rocker arm 1 and the insert element 8 are rigidly connected to each other by the coupling means 13 to form a unit, an opening of the gas exchange valve, not shown, is effected by the hydraulic clearance compensation element 6.
- the switching-off of the gas exchange valve is achieved in that, by virtue of a pressure oil supply 20, the locking piston 16 loaded by the spring 15 is pushed back by the locking cap 18, so that the rocker arm 1 and the insert element 8 are no longer positively connected to each other.
- the rear end 5 of the rocker arm 1 does indeed move downward along its axis 19 but the insert element 8 supported by the hydraulic clearance compensation element 6 and the gas exchange valve hardly changes its position i.e., it slides in the bore 7.
- the reception space for the spring 10 defined between the rear end 5 and the insert element 8 is decreased in size so that the spring 10 is compressed and subsequently causes a resetting of the rocker arm 1. Due to the stop 24, upon a return movement of the rocker arm 1, the insert element 8 and the hydraulic clearance compensation element 6 are returned to the position they originally occupied prior to the idle stroke.
- the rocker arm shown in FIGS. 2 and 3 differs from that of FIG. 1 in that coupling means 13 are arranged at two points opposite each other and in that the resetting of the rocker arm 1 is effected by a torsion leg spring 21 arranged around the axle 2.
- One leg 22 of this torsion leg spring 21 bears against the rocker arm body 1 and a second leg 23 against the insert element 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims (5)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19608651 | 1996-03-06 | ||
DE19608651A DE19608651A1 (en) | 1996-03-06 | 1996-03-06 | Valve train for gas exchange valves of internal combustion engines |
PCT/EP1996/004330 WO1997033076A1 (en) | 1996-03-06 | 1996-10-04 | Valve drive for gas exchange valves of internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
US5992360A true US5992360A (en) | 1999-11-30 |
Family
ID=7787389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/125,805 Expired - Fee Related US5992360A (en) | 1996-03-06 | 1996-10-04 | Valve drive for gas exchange valves of internal combustion engines |
Country Status (5)
Country | Link |
---|---|
US (1) | US5992360A (en) |
JP (1) | JP2000506242A (en) |
KR (1) | KR19990087518A (en) |
DE (2) | DE19608651A1 (en) |
WO (1) | WO1997033076A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1221541A2 (en) * | 2001-01-05 | 2002-07-10 | Delphi Technologies, Inc. | Valve deactivation system |
US6481399B1 (en) * | 1999-10-29 | 2002-11-19 | Sts System Technology Services Gmbh | Mechanical regulation of the stroke adjustment of an intake valve of an internal-combustion engine |
US20040112330A1 (en) * | 2000-12-22 | 2004-06-17 | Volvo Lastvagnar Ab | Method and arrangement for affecting engine braking |
US20050028776A1 (en) * | 2002-01-18 | 2005-02-10 | Walter Speil | Switched cam follower or switched support element of a valve gear of an internal combustion engine |
US20110186008A1 (en) * | 2008-09-18 | 2011-08-04 | Avl List Gmbh | Engine braking device for an internal combustion engine |
US20110232603A1 (en) * | 2007-10-26 | 2011-09-29 | Schaeffler Technologies Gmbh & Co. Kg | Reciprocating-piston internal combustion engine with engine brake and additional opening of an exhaust valve |
KR101338462B1 (en) | 2012-10-16 | 2013-12-10 | 현대자동차주식회사 | Variable valve lift device |
KR101394049B1 (en) | 2012-10-17 | 2014-05-09 | 현대자동차 주식회사 | variable valve lift device |
WO2021078413A1 (en) * | 2019-10-22 | 2021-04-29 | Eaton Intelligent Power Limited | Lifter assembly |
US11686224B2 (en) | 2019-06-20 | 2023-06-27 | Eaton Intelligent Power Limited | Cylinder deactivation and engine brake mechanism for type III center pivot valvetrains |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19755276A1 (en) * | 1997-12-12 | 1999-06-17 | Bayerische Motoren Werke Ag | Electromagnetic actuator for controlling gas changeover valve in IC engine |
DE19914046A1 (en) * | 1999-03-27 | 2000-09-28 | Schaeffler Waelzlager Ohg | Valve drive tappet for internal combustion engine, with compression piston at leased partly enclosed by spring on region projecting from underside of tappet |
DE19915531A1 (en) * | 1999-04-07 | 2000-10-12 | Schaeffler Waelzlager Ohg | Cam tracker for valve drive of internal combustion engine, with locking element such as piston fixed in inner element receiver |
DE10041466B4 (en) * | 2000-08-23 | 2008-10-09 | Man Diesel Se | Valve drive for gas exchange valves of an internal combustion engine |
US6901893B1 (en) * | 2004-04-15 | 2005-06-07 | Stanadyne Corporation | Valve deactivator assembly |
DE102007013947A1 (en) * | 2007-03-23 | 2008-09-25 | Schaeffler Kg | Valve gear of an internal combustion engine with a deactivatable Tellerhubventil |
FR2971012A1 (en) * | 2010-12-22 | 2012-08-03 | Valeo Sys Controle Moteur Sas | DEBRAYABLE ROCKER FOR VALVE DISCONNECTION. |
DE102017113783A1 (en) | 2017-06-21 | 2018-12-27 | Man Truck & Bus Ag | Power transmission device |
CN108487961A (en) * | 2018-03-27 | 2018-09-04 | 安徽江淮汽车集团股份有限公司 | A kind of variable air valve lift range mechanism |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE441182C (en) * | 1924-05-14 | 1927-02-24 | Franz Kruckenberg Dipl Ing | Device for eliminating lateral forces on the vehicles of monorail high-speed railways caused by cross winds |
US4141333A (en) * | 1975-01-13 | 1979-02-27 | Gilbert Raymond D | Valve train systems of internal combustion engines |
GB2075118A (en) * | 1980-04-23 | 1981-11-11 | Mitsubishi Motors Corp | Mechanism for stopping valve operation |
DE3118466A1 (en) * | 1981-05-09 | 1982-11-25 | Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt | Rocker arm of an internal combustion engine |
DE4213856A1 (en) * | 1992-04-27 | 1993-10-28 | Iav Motor Gmbh Ingenieurgesell | Valve drive for gas exchange valves in IC engines - has two tappets, which are coupled and uncoupled in cam base circle area |
DE9315436U1 (en) * | 1993-10-13 | 1993-12-23 | INA Wälzlager Schaeffler KG, 91074 Herzogenaurach | Cam follower |
DE4235626A1 (en) * | 1992-10-22 | 1994-04-28 | Iav Motor Gmbh | Valve drive with alternating cams for gas exchange valves - has second U=shaped transfer lever and tappet, for large active lift |
DE4238325A1 (en) * | 1992-11-13 | 1994-05-19 | Iav Motor Gmbh | Switchable valve drive for combustion engine - uses balls as driver elements to maintain contact with single cam |
DE4422340A1 (en) * | 1993-07-14 | 1995-01-19 | Bayerische Motoren Werke Ag | Shut-off device for an internal combustion engine lifting valve |
DE4404145A1 (en) * | 1994-02-09 | 1995-08-10 | Schaeffler Waelzlager Kg | Switching device in a valve train |
US5474037A (en) * | 1993-06-24 | 1995-12-12 | Audi Ag | Valve train for an internal combustion engine |
US5577469A (en) * | 1994-03-16 | 1996-11-26 | Iav Motor Gmbh | Device for controlling a valve of an internal combustion engine |
US5651335A (en) * | 1993-05-04 | 1997-07-29 | Ina Walzlager Schaeffler Kg | Valve tappet |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4411182B4 (en) * | 1994-03-31 | 2004-04-08 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Switchable valve control for internal combustion engines |
-
1996
- 1996-03-06 DE DE19608651A patent/DE19608651A1/en not_active Withdrawn
- 1996-10-04 KR KR1019980706951A patent/KR19990087518A/en active IP Right Grant
- 1996-10-04 US US09/125,805 patent/US5992360A/en not_active Expired - Fee Related
- 1996-10-04 WO PCT/EP1996/004330 patent/WO1997033076A1/en active IP Right Grant
- 1996-10-04 DE DE19681303T patent/DE19681303D2/en not_active Expired - Lifetime
- 1996-10-04 JP JP09531374A patent/JP2000506242A/en active Pending
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE441182C (en) * | 1924-05-14 | 1927-02-24 | Franz Kruckenberg Dipl Ing | Device for eliminating lateral forces on the vehicles of monorail high-speed railways caused by cross winds |
US4141333A (en) * | 1975-01-13 | 1979-02-27 | Gilbert Raymond D | Valve train systems of internal combustion engines |
GB2075118A (en) * | 1980-04-23 | 1981-11-11 | Mitsubishi Motors Corp | Mechanism for stopping valve operation |
DE3118466A1 (en) * | 1981-05-09 | 1982-11-25 | Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt | Rocker arm of an internal combustion engine |
DE4213856A1 (en) * | 1992-04-27 | 1993-10-28 | Iav Motor Gmbh Ingenieurgesell | Valve drive for gas exchange valves in IC engines - has two tappets, which are coupled and uncoupled in cam base circle area |
DE4235626A1 (en) * | 1992-10-22 | 1994-04-28 | Iav Motor Gmbh | Valve drive with alternating cams for gas exchange valves - has second U=shaped transfer lever and tappet, for large active lift |
DE4238325A1 (en) * | 1992-11-13 | 1994-05-19 | Iav Motor Gmbh | Switchable valve drive for combustion engine - uses balls as driver elements to maintain contact with single cam |
US5651335A (en) * | 1993-05-04 | 1997-07-29 | Ina Walzlager Schaeffler Kg | Valve tappet |
US5474037A (en) * | 1993-06-24 | 1995-12-12 | Audi Ag | Valve train for an internal combustion engine |
DE4422340A1 (en) * | 1993-07-14 | 1995-01-19 | Bayerische Motoren Werke Ag | Shut-off device for an internal combustion engine lifting valve |
DE9315436U1 (en) * | 1993-10-13 | 1993-12-23 | INA Wälzlager Schaeffler KG, 91074 Herzogenaurach | Cam follower |
DE4404145A1 (en) * | 1994-02-09 | 1995-08-10 | Schaeffler Waelzlager Kg | Switching device in a valve train |
US5577469A (en) * | 1994-03-16 | 1996-11-26 | Iav Motor Gmbh | Device for controlling a valve of an internal combustion engine |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6481399B1 (en) * | 1999-10-29 | 2002-11-19 | Sts System Technology Services Gmbh | Mechanical regulation of the stroke adjustment of an intake valve of an internal-combustion engine |
US20040112330A1 (en) * | 2000-12-22 | 2004-06-17 | Volvo Lastvagnar Ab | Method and arrangement for affecting engine braking |
US6792904B2 (en) * | 2000-12-22 | 2004-09-21 | Volvo Lastvagnar Ab | Method and arrangement for affecting engine braking |
US20050039712A1 (en) * | 2001-01-05 | 2005-02-24 | Delphi Technologies, Inc. | Valve deactivation system with free motion spring |
EP1221541A3 (en) * | 2001-01-05 | 2004-07-21 | Delphi Technologies, Inc. | Valve deactivation system |
US6799543B2 (en) * | 2001-01-05 | 2004-10-05 | Delphi Technologies, Inc. | Valve deactivation system with free motion spring |
EP1221541A2 (en) * | 2001-01-05 | 2002-07-10 | Delphi Technologies, Inc. | Valve deactivation system |
US7059287B2 (en) * | 2002-01-18 | 2006-06-13 | Ina Schaeffler Kg | Switched cam follower or switched support element of a valve gear of an internal combustion engine |
US20050028776A1 (en) * | 2002-01-18 | 2005-02-10 | Walter Speil | Switched cam follower or switched support element of a valve gear of an internal combustion engine |
US20110232603A1 (en) * | 2007-10-26 | 2011-09-29 | Schaeffler Technologies Gmbh & Co. Kg | Reciprocating-piston internal combustion engine with engine brake and additional opening of an exhaust valve |
US8387590B2 (en) * | 2007-10-26 | 2013-03-05 | Schaeffler Technologies AG & Co. KG | Reciprocating-piston internal combustion engine with engine brake and additional opening of an exhaust valve |
US20110186008A1 (en) * | 2008-09-18 | 2011-08-04 | Avl List Gmbh | Engine braking device for an internal combustion engine |
KR101338462B1 (en) | 2012-10-16 | 2013-12-10 | 현대자동차주식회사 | Variable valve lift device |
KR101394049B1 (en) | 2012-10-17 | 2014-05-09 | 현대자동차 주식회사 | variable valve lift device |
US11686224B2 (en) | 2019-06-20 | 2023-06-27 | Eaton Intelligent Power Limited | Cylinder deactivation and engine brake mechanism for type III center pivot valvetrains |
US11898470B2 (en) | 2019-06-20 | 2024-02-13 | Eaton Intelligent Power Limited | Cylinder deactivation and engine brake mechanism for type III center pivot valvetrains |
WO2021078413A1 (en) * | 2019-10-22 | 2021-04-29 | Eaton Intelligent Power Limited | Lifter assembly |
Also Published As
Publication number | Publication date |
---|---|
DE19681303D2 (en) | 1999-03-11 |
DE19608651A1 (en) | 1997-09-11 |
JP2000506242A (en) | 2000-05-23 |
KR19990087518A (en) | 1999-12-27 |
WO1997033076A1 (en) | 1997-09-12 |
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Legal Events
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AS | Assignment |
Owner name: INA WALZLAGER SCHAEFFLER OHG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ELENDT, HARALD;HAAS, MICHAEL;REEL/FRAME:009501/0700 Effective date: 19980817 |
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Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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FPAY | Fee payment |
Year of fee payment: 4 |
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Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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Effective date: 20071130 |